Answer:
42x^2
Step-by-step explanation:

Answer:
x-3 and y=2
Step-by-step explanation:
2x + 12 = 18
18 - 12 = 6
2x = 6
x = 3
Answer:
40320 ways
Step-by-step explanation:
Given
Members = 8
Required
Number of ways they can be selected
Since, the order does not matter;
They can be selected in 8! ways


<em>Hence, there are 40320 ways which the director can select them for the concert</em>